Emission line profiles of images A (black), B (blue), C (red), and D (green) at different observational epochs in the rest-frame after the continuum has been subtracted and the line core has been matched (see text). The Lyα line is shown in the top left panel at two different epochs. The top right panel shows the Si IV line in three observational epochs, while the bottom panel displays 20 observational epochs for the C IV line. Observations reveal significant deformations and variability in the blue wings of all emission lines, with image A showing the most pronounced changes. In addition, image A appears to be demagnified in the red wings. The y-axis represents the flux in arbitrary units.